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Questions tagged [packages]

In electronics packages refer to the physical encapsulation of a device. Most package names are standardized, so for example a TO-92 package will have similar dimensions and pin spacing between manufacturers so the same PCB footprint may be used. Be aware however many packages have subtle variations, for example TO-206AA, TO-206AB and TO-206AC.

4 votes
2 answers
2k views

Breakout Board for 1.27 mm to 2.54 mm

Is there any breakout board like this for 1.27 mm to 2.54 mm pitch? Example for 1.27 mm: Example for 2.54 mm: I also appreciate any hint how to perform this conversion on any other cheap way.
arminb's user avatar
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10 votes
3 answers
5k views

How do I pick a part that goes into a breadboard when I order it?

I have just bought some 555 timers and they are timers for microelectronic circuits...could anyone tell me what I need to search for in order to get larger ones which will fit a breadboard? Thanks
James Hatton's user avatar
26 votes
3 answers
7k views

ICs ("chips") are typically packaged in what material?

ICs are typically packaged (encapsulated) in a black "plastic". What is this packaging material made of? (source)
Sparkler's user avatar
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25 votes
2 answers
6k views

Why do radiation hardened IC packages often have long leads?

What purpose do long leads serve?
Dojo's user avatar
  • 949
9 votes
2 answers
6k views

In i.e. a TO-220 package, why is mounting the (pin connected) tab to case safe?

All the time I hear that the tab on a TO-220 like package is electrically connected to the centre pin, for example "out" on voltage regulators. Does mounting them to a heatsink (of which may come in ...
Tom Paris's user avatar
  • 282
6 votes
2 answers
4k views

Standard packages for compact SMT crystals

There is an old and bog standard form factor for SMT crystals - HC49/US. The problem is that HC49/US takes a lot of real estate on the board. It's 12mm long. Another problem with crystals and ...
Nick Alexeev's user avatar
  • 38.3k
5 votes
3 answers
2k views

Correct pin naming of BGA and DIL chips

Some ICs have their pins labelled only with numerical values and some use alphanumeric labels. I want to know what is the correct naming term for these cases. Is it ok to call all the chips with ...
Dumbo's user avatar
  • 3,284
2 votes
2 answers
92 views

Pin 1 in OPA237UA in SO package

I have built some circuit and it doesn't work. Can I ask if my interpretation of datasheet is correct? There is no hole, no proper dot on my package, but there is a symbol with 2 concentric circles ...
Kamil's user avatar
  • 6,024
1 vote
2 answers
666 views

is there a standard name for surface-mounted 0.1" pitch DIP packages?

I've seen several boards that have ICs that look very similar to standard through-hole DIP packages (in particular, the packages have pins on 0.1" pitch), but the boards do not have any holes for the ...
davidcary's user avatar
  • 17.7k
0 votes
1 answer
159 views

NOR Gate is Working Correctly with Vcc Pin Disconnected

I modified my Sega Master System to have a pause button on the actual controller. To process the signal, I soldered a quad NOR gate to the I/O and CPU circuits in the console. The idea is that the ...
Nester's user avatar
  • 61
15 votes
1 answer
17k views

What is the difference between VQFP, HVQFP, TQFP & PQFP?

VSC7145XRU-31/C - this IC uses PQFP package the replacement component for that TLK2201 uses HVQFP package also TLK2541 uses TQFP that's why i wanted to know whats the clear difference between ...
K S K Chaitanya's user avatar
14 votes
5 answers
20k views

What is the impact of package on SMD capacitor

Most of electronic component exist in different package for different reason, it can either be power rating, reachable value, power dissipation... As far as I understood, the size of resistor ...
M.Ferru's user avatar
  • 3,946
14 votes
5 answers
25k views

What is µMAX IC package?

While ordering free samples from Maxim I have often seen components packaged as µMAX. What is µMAX? When googling for it all I get are some Maxim components. If I look at google images I get an ...
Majenko's user avatar
  • 56.3k
13 votes
2 answers
8k views

ESR and ESL, small package vs large (SMD)

I was wondering if someone could explain why larger package capacitors (1210) are supposed to have more ESL and ESR than a smaller - say 0603 package? I would imagine the larger package is still ...
user8040's user avatar
  • 176
12 votes
1 answer
3k views

What standard governs the dimensions of SMT chip resistors and capacitors?

I am aware of the JEDEC registered outlines, which define the standard mechanical dimensions and tolerances for a wide variety of solid-state packages. However, these standards do not appear to cover ...
SWB's user avatar
  • 333

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